code: def test_config(self):
      cat_hinge_obj = hinge_metrics.CategoricalHinge(
          name="cat_hinge", dtype="int32"
      )
      self.assertEqual(cat_hinge_obj.name, "cat_hinge")
      self.assertEqual(cat_hinge_obj._dtype, "int32")
  
      # Check save and restore config
      cat_hinge_obj2 = hinge_metrics.CategoricalHinge.from_config(
          cat_hinge_obj.get_config()
      )
      self.assertEqual(cat_hinge_obj2.name, "cat_hinge")
      self.assertEqual(len(cat_hinge_obj2.variables), 2)
      self.assertEqual(cat_hinge_obj2._dtype, "int32")
  
file_path: keras/keras/metrics/hinge_metrics_test.py
imports: import numpy
  from keras import testing
  from keras.metrics import hinge_metrics
label_desc: Use image node_id 1 for calling the CategoricalHingeTest obj's underlying member method code with example usage: obj.test_config() without return types